US8917681B2

4G 5G

Title:
Method and apparatus for transmitting downlink reference signal in wireless communication system that supports multiple antennas

Application Number:

US201013387705

Family ID:

9248

Publication Date:

23-12-2014

Application Date:

13-08-2010

Priority Date:

14-08-2009

Declaring Company:

LG

Current Assignee:

LG

Abstract  Abstract

A method for transmitting reference signals for eight or fewer antenna ports includes mapping a portion of common reference signals (CRSs) for four or fewer antenna ports into a downlink subframe including 1 st slot and 2nd slot with a normal cyclic prefix configuration; mapping channel status information reference signals (CSI-RSs) for eight or fewer antenna ports into the downlink subframe according to a preset pattern; and transmitting the downlink subframe into which the CRSs and the CSI-RSs are mapped wherein the preset pattern defines the CSI-RSs for eight or fewer antenna ports to be mapped onto two OFDM symbols of the data region in the downlink subframe with the two OFDM symbols being spaced apart by one OFDM symbol and wherein the portion of the CRSs for four or fewer antenna ports is limited to the CRSs for two or fewer antenna ports.